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Specification of Letters Patent.

Patented Aug. 21", 1906.

Application filed April 19, 1905. Serial No. 256.509.

looks and being particularly adapted for use in connection with latches wherein a sliding latch-bolt is embodied; and the primary object thereof is to provide improved locking means for controlling the means employed in the latch-housing for retractin the bolt.

' A further object is to provi e a simplified and inexpensive lock mechanism which will be exceedingly difficult to operate without the proper key.

Further objects and advantages will be set forth in the following description.

In the accompanying drawings, in which like numerals'of reference indicate like parts throughout the several views, Figure 1 is a plan view of a latch, the cover-plate being removed, provided with my improvement. Fig. 2 is a section taken on line 2 2 of Fi 1. Fig. 3 is a detail view of my improved lock with the casing thereof shown in diametrical section. of Fig. 3. Fig. 5 is a section taken on line 5 5 of Fig. 3; and Fig. 6 is a diametrical section showing a key in position, the same having retracted the locking-pins, those sections of the respective barrels immediately in the rear of the key being removed.

The invention inbludes a casing composed of outer andinner shells 1 and 2, shell 1 being rovided at its inner end with a wall which is ormed with an axial opening 3, the function of which will be made apparent in the follow- The inner shell 2 has its outer end formed with an outturned externally-threaded flange 4, which bears on the outer end of shell 1 and has its threads normally engaged with internal threads of a cap 5, whlch is threaded onto shell 1 and forms a closure for the outer end of the casing. In the forward half of this casing is placed what I term a front barrel fi, and in the rear half is the longitudinal Fig. 4 is a section taken on line 4.- 4'

crate when the lock is on that side of the as to form a continuous keyway. Adjacent their forward and rear ends these barrels are formed with suitable transversely-disposed apertures which extend entirely therethrough, and in these apertures lock pins or tumblers 9 are located. These pins 9 are formed with laterally-projecting arms 10, which fit freely in suitable slots 11, communicating with said apertures and keyway, and these arms extend across the said keyway.

The loclrins are of suitable size to move l y inthe apertures and are formed equal in length to the length of respective apertures and are normally yieldingly held with one end portion projecting slightly beyond the periphery of the barrels when the arms 10 rest against the walls of slots 11, which lie closest to the center of the keyway, and'said pins are held in this position by springs, as 12, of suitable form to allow the pins to be moved inwardly. These springs are arranged about the pins in'suitable enlargementsof the saidapertures formed-at the slots 11 and press upon the arms 10 and against the end wall of said enlargements.

The barrels 6 and 7 normally rest with their respective key-openings standing at right angles to each other, (see Fig. 4,) and suitable apertures, as 14, are arranged in the shell 2 to receive the projecting ends of the lock-pins when the barrels are so resting, thereby locking them from rotation. Apertures 15 are arranged to receive the opposite ends of said pins should they be shifted too far.

Secured to the rear end of barrel 7 and projecting through the opening 3 of the casing is a stem 17, having laterallyrejecting arms or cams 18 and 18 arm 18 0 which is adapted. to bear on the end portion of one arm of a bell-crank lever 19, pivoted on a stud. 20, se.. cured to latch-housing 21, and the other arm of this lever bears on the forward face of a shoulder 22, formed on the shank of a latchbolt 23. This latch-bolt 23 is slidablymounted in the housing 21 and is yieldingly held in advanced or looking position by a spring 24-. When the lock is shifted to the opposite side of the housingZl as indicated by dotted lines in Fig. 2, the arm18' upon proper rotation of the barrels will engage lug 25, secured to the inner end of the latch-bolt, and thereby retract the-same. It will therefore be obvious that bell-cranlr lever 19 and arm 18 only oplatph-hou sing, as indicated in Figs. 1 and 2.-

in the construction shown (see Fig. 2) the lock-casing 1 .is threaded into one'wa'll of the latch-housing and is secured by a screw 13.

Consequently the latch-bolt can be moved". only through the employment of a key from one side of the door. From the other side of door the latch-bolt is operated by the usual knob 26, the spindle 27 of which projects into the housing 21 and has secured thereon the usual roll-back 28, provided with opposite projections, which en age suitable lugs on the yoke'29. One of t ese lugs, as 30, is extended beyond the outer edge of the yoke, so

asto engage the shoulder 31 of latch-bolt, and thereby retract the same when the roll- ".back isturned by rotation of said knob 26.

The yoke is slidably mounted on a suitable guide 32 and is returnedto its normal posi= tion after each movement thereof by means of a spring 33.

Numeral 34 indicates a pivoted catch of usual form, which can be operated from the edge plate of the housing, so that its inner end will be swung into engagement with the forward face of shoulder 22, and thereby holdthe latch-bolt in retracted position.

The knob-spindle 27 and the lock-casing are both removable, so that they can be arranged on either side of the latch-housing, as indicated by 'full' and broken 1' es in Fig. 2,

it being obvious it is desirous t at the keycontrolled means should always be at the outer side of the door, so that entrance to the house'can only be effected through the intermediacy of a key.

a of'suitab e form to Each barrel is formed in four longitudinal barrels 6 and 7 and is provided with notches .37 on its opposite side edges of the forward half, as shown, which receive the'arms 10 on the lock-pins in the front barrel 6 and hold these pins from en agement with the shell 2. The-forward'barre; is then free for rotation and is turned a uarter of a turn in the direction of arrow A, ig. 4,.by turning the key to brin the key-opening into alineinent with the ey-openingin the rear'barrel 7. The key is, then pressed inward, and the notches 37 in the'iorward half of'the key serve to operate "the lock-pins in the rear barrel, while the roections 37 in the rear half ofthe key 01 the lock-pins in the front barrel disengaged from the casing durin thismovement, as illustrated in Fig. 6. I is seated properly in the keyway, both barenthe key I latch-bolt 23 is drawn to retracted position.

This reverse movement returns the front barrel to normal position, and the key can then be withdrawn, and spring 24 will reset the rear barrel to its normal position. The notches 37 and 37" are obviously the same in order that the both will serve to retract the lock-pins of 'arrel 8. Notches 37" are difierent, however. Therefore the lock is made more difficult to operate by a person who is not provided with the proper key.-

If the lock-pins should be moved too far by a key, the opposite ends thereof will be brought into engagement with the openings 15, and thus prevent rotation of the barrel,

and even should they be properly moved to allow the front barrel 6 to be turned those pins in barrel 7 will also have to be properly retracted, and so held before both barrels can be simultaneously rotated.

Having thus described my invention,.what

I claim as new, and desire to secure by Letters Patent of the United States of America,

1 A look comprising a casing, rotatable barrelsmounted therein and being formed with key-openings, the saidkey-openings being normally out of registration, transverse lock-pins slidablymounted in said barrels, means normally forcing said pins into locking engagement with the casing, and means actuated from said key-openings for retracting said lock-pins.

2. Alock comprising a casing, a plurality of barrels formed with ke openings and transverse apertures exten ing entirely through the barrels, the key-openingsin said barrels being normally out of registration, said casing having apertures arranged at the o posite end of the apertures oi saidbarre s, spring-pressed lock-pins mounted in the apertures of thebarrels and having one of their ends normally projected and engaged in the adjacent aperturesof the casing, the opposite apertures of the casing being adapted to receive the opposite ends of said pins, and arms secured to said-lock-pins and projecting into said key-openings.

3. 'A look comprising a casing composed-of inner and outer shells, means securing said shells togethensaid inner shell being formed with apertures, barrels rotatably mounted in the inner shell,: said barrels being formed with'key-openings adapted to register, but being normally out of registratibn, springpressed lock-pins mounted in said barrel,

said lock-pins normally projecting into the apertures of said inner shell, and means car-- ried by saidlock-pins and controlled from said key-openingsifor retracting said lockpms.

4. A look comprisin a casing, barrels formed with longitudina openings forming a keyway, said longitudinal openings in the barrels being normally out of registration, transverse lock-pins movable entirely through the barrels, springs for normally projecting said lock-pins beyond the periphcry of said barrels, said casing being formed with apertures into which the proj eoting ends of said look-pins are normally engaged and apertures into which the opposite ends of said lock-pins are movable When said lockpins are retracted too far, and arms carried by said lock-pins and projecting into'said "keyway.

5. In combination With the latch-housing and the bolt slidable therein, a lock-casing constructed ,to be attached to either side of said housing, a key-operated rotatable barrel in said casing, two devices in said housin operatively connected to said bolt, an

means on said barrel for operating said de- 20 means when the lock-casing is at the other 2 5 side of said housing.

Signed at Portland, Oregon, this 20th day of March, 1905.

, FRANK.A. OWENS. r Witnesses: I

H. H. NEWHALL, W. J. LYoNs. 

